Device for shaping and vulcanizing automobile-tire patches.



A. L. MURRAY. 7 DV|0E FOR SHAPING AND VU LCANIZlNG AUTOMOBILE 'HRE PATCHES.

APPLICATION FILED MAR. 15. I918 Y 1,274,073. A Patented July 30,1918.

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' /NVENTOR. CZFZeYL" L.771u. -Y25 A. L. MURRAY. DEVICE FOR smms AND VULCANIZING AUTOMOBILE me mcurs.

APPLlCATlON FILED MAR. 15. I918. 1 ,274,073, Patented= July 30,1918.

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A f 11/11 l/l t r l i I INVENTOR m vaj as 5m MALL, nrmnuzvs UNITED sTATEs PATENT OFFICE.

ALBERT Ii. MURRAY, 0F AUBURN, INDIANA. ASSIGNOR TO THE DOIlBLE FAIBMU TIRE COMPANY, OF AUBURN. INDIANA, A CORPORATION.

DEVICE FOR SHAPING; AND VULCANIZING AUTOMOBILE-HIKE PATCH.

Specification of Letters Patent.

Patented J My 30, 1918.

Application tled Narch 15, 1918. Serial No. 222,615.

To all whom, it may concern.

Be. it known that. l. .uannrr L. Mummy, a citizen of the United States, residing at Auburn. in the county of llekalb and State of Indiana. have invented new and useful Improvements in Devices for Shaping and Valcanizing Automobile'Tirc Patches. of which the following is a specification.

The invention relates to devices for shaping and vulcanizing automobile tire patches. It; is desirable that patches for use in telnporarily repairing a tire casing shall conform to the contour of the casing so that. it;

- shall snugly fit the same when it is applied.

Prior to my invention it was diliicnlt in forming the patch from a previously built,- up fiat, unit. of several plies to prevent its wrinkling or the separation of its plies of rubberized fabric. The only previously known means of preventing the separation of the plies or the forming of wrinkles therein has been. in the building of the raw patch, to use a much greater proportion of costly new rubber' in rubberizing the fabric than is necessary in the finished article, or to expend exce sive time and labor in attempting to iron out the wrinkles in the finished article, which wrinkles must be removed to prevent, injury to the patch or to the inner tube in use.

The object of my invention is to provide simple and novel means by which the patch may be shaped and. vulcanized with great rapidity and with entire absence of wrinkles or separation of its plies.

In the accompanying drawings l illustrate one manner in which the invention is capable of being carried out in practice, in which- Figure 1 is a side elevational view of the device; Fig. .2 an end view of the same; Fig. 3 a broken away side elevational view of the mold; Fig. 4 an elevational view of one end of the same, Fig. 5 an elevational view of an end clamping plate; Fig. 6 a side view of the clamping plate; Fig. 7 an elevational view of one of the spriu 1plates; Fig. 8 an end view of be same; t) isa side view of one of the levers and ig. 10 an elevational view of the same; Fig. 11 a plan view, partly broken, of a raw patch.

Roforrin to the drawings. 10 is the body h m lfl ng'a Steam jacket 11 therein to which pipes 12iand 13 are connected for supplying steam to heat the mold. Recess or cavity 14 is formed in the mold and is adapted to receive the patch to be shaped and vulcanized. The bottom wall 15 of the cavity is concave both transversely and longitudinally to correspond to a pneumatic tire casing. The upper ortion 16 of each outer wall 17 of the met is beveled or inclined inwardly toward its upper edge and the up er edges of both portions are con-- caved ongitudinally similarly to bottom 15. A fixed pin 18 projects outwardly from each end wall 19 of the mold and upon this pinis revolubly mounted a lever 20 having on its inner face a cam 21. A plate 22 is loosely engaged on each end of the mold and is provided with aperture 23 within which cam 21 is operative to raise and lower .the plate according as lever ZOis rocked- Lateral flanges 24 on the side, edges of the plate bear upon walls 17 of the mold and flanges 95 arranged at the side edges of the upper portion of the plate. are inclined to corres 0nd to the inclination of portions 16 of wal s 17 and from which portions they are spaced suttlcieutly to permit of the insertion of the ends of spring plates 26. Plates 26 are formed of relativelv thin material and are curved longitudinally and when their ends are engaged behind flanges 25 the convex surface thereof abuts portions 16 of walls 17.

Handles 27 attached to the lates afl'ord easythe mold or with any material placed tween the plates and the walls of the mold; the central portion of each plate, due to its convexity, gri ping the central portions of the material t at is. the central portions of flaps 28 of the raw patch Qtl'which lie tween the plates 26 and portions 16 of walls 17 of the mold. y I t A plunger 30 carried by screw 31 having an operating handle 82 is. adapted to be driven u and down 'b screw. he screw is readed into a crossarm 33 pivoted at. 84 to standard 35. Latch 36 is pivoted to the other end of the cross arm and is ada ted to be can ed under a fixed object. sac as the top 3 which supports the device. Lug 38 on the opposite end of the cross-arm serves as a stop which abuts standard 35 when the cross-arm is elevated on its pivot 84 and of a" table 

